Hopefully you mailed in separate envelopes and had tracking to verify delivery, otherwise there is no way to know if it was ever received.
The IRS is not currently processing mailed returns at all. You will have to decide whether to e-file Federal or not. If both e-filed AND the mailed return both get entered into the IRS processing system they will be red-flagged as duplicate returns and kicked out for hand processing which can cause delays of 6 months or more.
On the other hand, if not received by the IRS, the mailed return will never be processed.
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**NOTE*** Due to the Corona virus the IRS is operating short staffed. All field offices are closed and some processing centers are all but closed. Any tax return that requires hand processing will probably have long delays. Mailed returns are not being processed at all at this time. Most phone service has been curtailed.
https://www.irs.gov/newsroom/irs-operations-during-covid-19-mission-critical-functions-continue
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**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
